Simple PLL demostration

This m-file demonstrates PLL operation

Description

This m_file uses a PLL to demodulate an FM modulated carrier.

• MATLAB release: MATLAB 6.5 (R13)

[Andres Camilo Cuervo Pinilla]

PLEASE SR I WOULD LIKE TO KNOW THE MEAN OF SOME VARIABLES:

phi_hat(1)=30;
e(1)=0;
phd_output(1)=0;

vco(n)=conj(exp(1i*(2*pi*n*f/fs+phi_hat(n-1))));%Compute VCO
phd_output(n)=imag(Signal(n)*vco(n));%Complex multiply VCO x Signal input
e(n)=e(n-1)+(kp+ki)*phd_output(n)-ki*phd_output(n-1);%Filter integrator
phi_hat(n)=phi_hat(n-1)+e(n);%Update VCO

ALSO I WOULD LIKE TO KNOW HERE I COULD FIND SOME BOOKS TO READ ABOUT PLL

THANKS
AC

[Fernando Gregorio]

 

[Mike Woodward]

If you're interested in this submission, you might also like the new, free mixed-signal library available from here: http://www.mathworks.com/programs/mixed-signal/index.html